Hábitos alimenticios de Rhinella horribilis (Wiegman 1833) y Leptodactylus labrosus (Jiménez De la Espada, 1875) en el Área Nacional de Recreación Isla Santay (Guayas – Ecuador)
Fecha
2018
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Facultad de Ciencias Naturales, Universidad de Guayaquil
Resumen
Se analizaron los hábitos alimenticios de Rhinella horribilis y Leptodactylus labrosus en el Sendero Huaquillas del Área Nacional de Recreación Isla Santay ubicada en la cuenca del Río Guayas durante los meses de enero a junio de 2017. Se capturaron 31 individuos: 16 L. labrosus y 15 R. horriblilis. Se realizó lavados gástricos para la obtención de contenido estomacal. Los contenidos estomacales fueron analizados y las presas identificadas. Se calculó diferentes índices, Importancia Relativa, Amplitud de Nicho Trófico y Solapamiento Trófico. Para ambas especies el ítem alimenticio que tuvo mayor presencia numérica fue el orden Hymenoptera con 34% para L. labrosus y 45,65% en R. horribilis. Se determinó la existencia de traslape trófico entre ambas especies.
Feeding habits of Rhinella horribilis and Leptodactylus labrosus were analyzed from the Huaquillas Trail of the National Recreation Area Isla Santay located in the Guayas River basin, between january - june 2017. 31 individuals were captured: 16 L. labrosus and 15 R. horribilis. Stomach-flushing was performed to obtain stomach contents, which were analyzed and the food items identified. Different indices were calculated, Relative Importance Index, Trophic-Niche Breadth and Trophic-Niche Overlap. For both species, the most important prey was the order Hymenoptera with 34% for L. labrosus and 45.65% for R. horribilis. The existence of trophic overlap between both species was determined.
Feeding habits of Rhinella horribilis and Leptodactylus labrosus were analyzed from the Huaquillas Trail of the National Recreation Area Isla Santay located in the Guayas River basin, between january - june 2017. 31 individuals were captured: 16 L. labrosus and 15 R. horribilis. Stomach-flushing was performed to obtain stomach contents, which were analyzed and the food items identified. Different indices were calculated, Relative Importance Index, Trophic-Niche Breadth and Trophic-Niche Overlap. For both species, the most important prey was the order Hymenoptera with 34% for L. labrosus and 45.65% for R. horribilis. The existence of trophic overlap between both species was determined.
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HÁBITOS ALIMENTICIOS, SOLAPAMIENTO TRÓFICO, LAVADO GÁSTRICO